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src/share/vm/code/scopeDesc.cpp@e9ff18c4ace7 (annotated)

src/share/vm/code/scopeDesc.cpp

Wed, 02 Jun 2010 22:45:42 -0700

author

jrose

date

Wed, 02 Jun 2010 22:45:42 -0700

changeset 1934

e9ff18c4ace7

parent 1907

c18cbe5936b8

child 2103

3e8fbc61cee8

permissions

-rw-r--r--

Merge

duke@435	1	/*
trims@1907	2	* Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	# include "incls/_precompiled.incl"
duke@435	26	# include "incls/_scopeDesc.cpp.incl"
duke@435	27
duke@435	28
kvn@1688	29	ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool return_oop) {
duke@435	30	_code = code;
duke@435	31	_decode_offset = decode_offset;
duke@435	32	_objects = decode_object_values(obj_decode_offset);
cfang@1366	33	_reexecute = reexecute;
kvn@1688	34	_return_oop = return_oop;
duke@435	35	decode_body();
duke@435	36	}
duke@435	37
kvn@1688	38	ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, bool reexecute, bool return_oop) {
duke@435	39	_code = code;
duke@435	40	_decode_offset = decode_offset;
duke@435	41	_objects = decode_object_values(DebugInformationRecorder::serialized_null);
cfang@1366	42	_reexecute = reexecute;
kvn@1688	43	_return_oop = return_oop;
duke@435	44	decode_body();
duke@435	45	}
duke@435	46
duke@435	47
duke@435	48	ScopeDesc::ScopeDesc(const ScopeDesc* parent) {
duke@435	49	_code = parent->_code;
duke@435	50	_decode_offset = parent->_sender_decode_offset;
duke@435	51	_objects = parent->_objects;
cfang@1366	52	_reexecute = false; //reexecute only applies to the first scope
kvn@1688	53	_return_oop = false;
duke@435	54	decode_body();
duke@435	55	}
duke@435	56
duke@435	57
duke@435	58	void ScopeDesc::decode_body() {
duke@435	59	if (decode_offset() == DebugInformationRecorder::serialized_null) {
duke@435	60	// This is a sentinel record, which is only relevant to
duke@435	61	// approximate queries. Decode a reasonable frame.
duke@435	62	_sender_decode_offset = DebugInformationRecorder::serialized_null;
duke@435	63	_method = methodHandle(_code->method());
duke@435	64	_bci = InvocationEntryBci;
duke@435	65	_locals_decode_offset = DebugInformationRecorder::serialized_null;
duke@435	66	_expressions_decode_offset = DebugInformationRecorder::serialized_null;
duke@435	67	_monitors_decode_offset = DebugInformationRecorder::serialized_null;
duke@435	68	} else {
duke@435	69	// decode header
duke@435	70	DebugInfoReadStream* stream = stream_at(decode_offset());
duke@435	71
duke@435	72	_sender_decode_offset = stream->read_int();
duke@435	73	_method = methodHandle((methodOop) stream->read_oop());
cfang@1366	74	_bci = stream->read_bci();
cfang@1335	75
duke@435	76	// decode offsets for body and sender
duke@435	77	_locals_decode_offset = stream->read_int();
duke@435	78	_expressions_decode_offset = stream->read_int();
duke@435	79	_monitors_decode_offset = stream->read_int();
duke@435	80	}
duke@435	81	}
duke@435	82
duke@435	83
duke@435	84	GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) {
duke@435	85	if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
duke@435	86	DebugInfoReadStream* stream = stream_at(decode_offset);
duke@435	87	int length = stream->read_int();
duke@435	88	GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length);
duke@435	89	for (int index = 0; index < length; index++) {
duke@435	90	result->push(ScopeValue::read_from(stream));
duke@435	91	}
duke@435	92	return result;
duke@435	93	}
duke@435	94
duke@435	95	GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) {
duke@435	96	if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
duke@435	97	GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>();
duke@435	98	DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result);
duke@435	99	int length = stream->read_int();
duke@435	100	for (int index = 0; index < length; index++) {
kvn@479	101	// Objects values are pushed to 'result' array during read so that
kvn@479	102	// object's fields could reference it (OBJECT_ID_CODE).
kvn@479	103	(void)ScopeValue::read_from(stream);
duke@435	104	}
duke@435	105	assert(result->length() == length, "inconsistent debug information");
duke@435	106	return result;
duke@435	107	}
duke@435	108
duke@435	109
duke@435	110	GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) {
duke@435	111	if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
duke@435	112	DebugInfoReadStream* stream = stream_at(decode_offset);
duke@435	113	int length = stream->read_int();
duke@435	114	GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length);
duke@435	115	for (int index = 0; index < length; index++) {
duke@435	116	result->push(new MonitorValue(stream));
duke@435	117	}
duke@435	118	return result;
duke@435	119	}
duke@435	120
duke@435	121	DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const {
duke@435	122	return new DebugInfoReadStream(_code, decode_offset, _objects);
duke@435	123	}
duke@435	124
duke@435	125	GrowableArray<ScopeValue*>* ScopeDesc::locals() {
duke@435	126	return decode_scope_values(_locals_decode_offset);
duke@435	127	}
duke@435	128
duke@435	129	GrowableArray<ScopeValue*>* ScopeDesc::expressions() {
duke@435	130	return decode_scope_values(_expressions_decode_offset);
duke@435	131	}
duke@435	132
duke@435	133	GrowableArray<MonitorValue*>* ScopeDesc::monitors() {
duke@435	134	return decode_monitor_values(_monitors_decode_offset);
duke@435	135	}
duke@435	136
duke@435	137	GrowableArray<ScopeValue*>* ScopeDesc::objects() {
duke@435	138	return _objects;
duke@435	139	}
duke@435	140
duke@435	141	bool ScopeDesc::is_top() const {
duke@435	142	return _sender_decode_offset == DebugInformationRecorder::serialized_null;
duke@435	143	}
duke@435	144
duke@435	145	ScopeDesc* ScopeDesc::sender() const {
duke@435	146	if (is_top()) return NULL;
duke@435	147	return new ScopeDesc(this);
duke@435	148	}
duke@435	149
duke@435	150
duke@435	151	#ifndef PRODUCT
duke@435	152
duke@435	153	void ScopeDesc::print_value_on(outputStream* st) const {
duke@435	154	tty->print(" ");
duke@435	155	method()()->print_short_name(st);
duke@435	156	int lineno = method()->line_number_from_bci(bci());
duke@435	157	if (lineno != -1) {
duke@435	158	st->print_cr("@%d (line %d)", bci(), lineno);
duke@435	159	} else {
duke@435	160	st->print_cr("@%d", bci());
duke@435	161	}
duke@435	162	}
duke@435	163
duke@435	164	void ScopeDesc::print_on(outputStream* st) const {
duke@435	165	print_on(st, NULL);
duke@435	166	}
duke@435	167
duke@435	168	void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const {
duke@435	169	// header
duke@435	170	if (pd != NULL) {
duke@435	171	tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset());
duke@435	172	}
duke@435	173
duke@435	174	print_value_on(st);
duke@435	175	// decode offsets
duke@435	176	if (WizardMode) {
duke@435	177	st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->instructions_begin());
duke@435	178	st->print_cr(" offset: %d", _decode_offset);
duke@435	179	st->print_cr(" bci: %d", bci());
cfang@1335	180	st->print_cr(" reexecute: %s", should_reexecute() ? "true" : "false");
duke@435	181	st->print_cr(" locals: %d", _locals_decode_offset);
duke@435	182	st->print_cr(" stack: %d", _expressions_decode_offset);
duke@435	183	st->print_cr(" monitor: %d", _monitors_decode_offset);
duke@435	184	st->print_cr(" sender: %d", _sender_decode_offset);
duke@435	185	}
duke@435	186	// locals
duke@435	187	{ GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals();
duke@435	188	if (l != NULL) {
duke@435	189	tty->print_cr(" Locals");
duke@435	190	for (int index = 0; index < l->length(); index++) {
duke@435	191	st->print(" - l%d: ", index);
duke@435	192	l->at(index)->print_on(st);
duke@435	193	st->cr();
duke@435	194	}
duke@435	195	}
duke@435	196	}
duke@435	197	// expressions
duke@435	198	{ GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions();
duke@435	199	if (l != NULL) {
duke@435	200	st->print_cr(" Expression stack");
duke@435	201	for (int index = 0; index < l->length(); index++) {
duke@435	202	st->print(" - @%d: ", index);
duke@435	203	l->at(index)->print_on(st);
duke@435	204	st->cr();
duke@435	205	}
duke@435	206	}
duke@435	207	}
duke@435	208	// monitors
duke@435	209	{ GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors();
duke@435	210	if (l != NULL) {
duke@435	211	st->print_cr(" Monitor stack");
duke@435	212	for (int index = 0; index < l->length(); index++) {
duke@435	213	st->print(" - @%d: ", index);
duke@435	214	l->at(index)->print_on(st);
duke@435	215	st->cr();
duke@435	216	}
duke@435	217	}
duke@435	218	}
duke@435	219
duke@435	220	#ifdef COMPILER2
duke@435	221	if (DoEscapeAnalysis && is_top() && _objects != NULL) {
duke@435	222	tty->print_cr("Objects");
duke@435	223	for (int i = 0; i < _objects->length(); i++) {
duke@435	224	ObjectValue* sv = (ObjectValue*) _objects->at(i);
duke@435	225	tty->print(" - %d: ", sv->id());
duke@435	226	sv->print_fields_on(tty);
duke@435	227	tty->cr();
duke@435	228	}
duke@435	229	}
duke@435	230	#endif // COMPILER2
duke@435	231	}
duke@435	232
duke@435	233	#endif
duke@435	234
duke@435	235	void ScopeDesc::verify() {
duke@435	236	ResourceMark rm;
duke@435	237	guarantee(method()->is_method(), "type check");
duke@435	238
duke@435	239	// check if we have any illegal elements on the expression stack
duke@435	240	{ GrowableArray<ScopeValue*>* l = expressions();
duke@435	241	if (l != NULL) {
duke@435	242	for (int index = 0; index < l->length(); index++) {
duke@435	243	//guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal");
duke@435	244	}
duke@435	245	}
duke@435	246	}
duke@435	247	}